OS X获取当前运行的所有进程信息

processInfo.m

//
//  main.m
//  process
//
//  Created by piao on 15/8/13.
//  Copyright (c) 2015年 piao. All rights reserved.
//
 
#import <Foundation/Foundation.h>
#import <sys/sysctl.h>
#import <signal.h>
#import <unistd.h>
 
 
NSArray *processInfo() {
     
    int mib[4] = {CTL_KERN, KERN_PROC, KERN_PROC_ALL, 0};
    size_t size;
    int st = sysctl(mib, sizeof(mib) / sizeof(CTL_KERN), NULL, &size, NULL, 0);
     
    struct kinfo_proc * process = NULL;
    struct kinfo_proc * newprocess = NULL;
     
    do {
        size += size / 10;
        newprocess = realloc(process, size);
         
        if (!newprocess){
             
            if (process){
                free(process);
            }
             
            return nil;
        }
         
        process = newprocess;
        st = sysctl(mib, sizeof(mib) / sizeof(CTL_KERN), process, &size, NULL, 0);
         
    } while (st == -1 && errno == ENOMEM);
     
    if (st == 0) {
         
        if (size % sizeof(struct kinfo_proc) == 0){
            unsigned long nprocess = size / sizeof(struct kinfo_proc);
             
            if (nprocess){
                 
                NSMutableArray * array = [[NSMutableArray alloc] init];
                 
                for (unsigned long i = 0; i < nprocess; i++){
                     
                    NSNumber *processID = [NSNumber numberWithInt:process[i].kp_proc.p_pid];
                    NSString *processName = [[NSString alloc] initWithFormat:@"%s", process[i].kp_proc.p_comm];
                     
                    NSDictionary * dict = [[NSDictionary alloc] initWithObjects:[NSArray arrayWithObjects:processID, processName, nil]
                                                                        forKeys:[NSArray arrayWithObjects:@"pid", @"name", nil]];
                    [array addObject:dict];
                }
                 
                free(process);
                return array;
            }
        }
    }
     
    return nil;
}
 
int main(int argc, const char * argv[]) {
    @autoreleasepool {
        // insert code here...
        NSLog(@"process info:%@", processInfo());
    }
    return 0;
}